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LABORATORIES, INC. <br /> Herst Associates Project: Misc. Samples Reported: 10/23/2007 12:20 <br /> 4630 South Highway 94 North Outer Road Project Number: NCYC <br /> Saint Charles, MO 63304 Project Manager: David Vasbinder <br /> Volatile organicn 1 i ( Method260) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch 1D QC Sample ID QC Type Result Level PQL Units Recoveg RPD Recovery_ RPD Lab Quals <br /> Benzene BQJ1250 BQJ1250-BS1 LCS 26.620 25.000 0.50 ug/L 106 70-130 <br /> Bromodichloromethane BQJ1250 BQJ1250-BSI LCS 23.200 25.000 0.50 ug/L 92.8 70- 130 <br /> Chlorobenzene BQJ1250 BQJ1250-BS1 LCS 23.840 25.000 0.50 ug/L 95.4 70-130 <br /> Chloroethane BQJ1250 BQJ1250-BSI LCS 28.700 25.000 0.50 ug/L 115 70-130 <br /> ................. _ ........ ._ —- ---- - —. ...- <br /> 1,4-Dichlorobenzene BQJ1250 BQJ1250-BS1 LCS 24.060 25.000 0.50 ug/L 962 70-130 <br /> . .,.._..-.__.... .. ...... ... —. .......__ _...... . .....__.._.__... __ ._ ........... <br /> 1,1 Dichloroethane BQJ1250 BQJ1250-BS1 LCS 26430 25.000 0.50 ug/L 106 70-130 <br /> .........- --- — <br /> 1,1 Dichloroethene BQJ1250 BQJ1250-BSI LCS 26.050 25.000 0.50 ug/L 104 70-130 <br /> -- .._....... _ ...._..._. — ......._...... ---... - __...__. ... . _...................-.-,. - ---- -- ...._..... . ... --- <br /> Toluene BQJ1250 BQJ1250-BSI LCS 24.770 25.000 0.50 ug/L 99.1 70-130 <br /> --._ ............ ........._._.... _ ....— . ....... .. <br /> ..-- _... <br /> -... . _..-._.__. ...._ <br /> Trichloroethene BQJ1250 BQJ1250-BSI LCS 27.160 25.000 0.50 ug/L 109 70-130 <br /> 1,2 Dichloroethane-d4(Surrogate) BQJ1250 BQJ1250-BS1 LCS 9.7500 10.000 ug/L 97.5 '76-114 <br /> .. - _... .... ........_- ... .._...-.....__.. __ _ <br /> Toluene-d8(Surrogate) BQJ1250 BQJ1250-BS1 LCS 9.8700 10.000 ug/L 98.7 88-110 <br /> .....- — ._._. ..... _..--— _ .._.__._. ...-- ... ........_. .. - ---.. <br /> 4-Bromoftuorobenzene(Surrogate) BOJ1250 BQJ1250-BS1 LCS 9.5900 10.000 ug/L 95.9 86-115 <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody doctunent. This analytical report Waist be reproduced in its entirely. <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laborawries,Inc.assumes no reslwnsibility for report alteration,separation, detachment or third party interpretation. Page 28 of 32 <br /> 4100 Atlas Court•Bakersfield,CA 93308•(661)327-4911 •FAX(661)327-1918 •www.belabs.com <br />